Equivalent & Substitute Parts for RO3101A

Part Overview

The RO3101A is a 433.92 MHz SAW (Surface Acoustic Wave) resonator manufactured by Murata Electronics, designed for surface mount applications in RF communication systems. This component operates across the industrial temperature range of -40°C to 85°C with frequency stability of ±0.032ppm and frequency tolerance of ±75kHz. The RO3101A is classified as obsolete, making identification of compatible substitute parts essential for ongoing production and maintenance applications.

Substiute Parts

RO3101A

Murata ElectronicsIn Stock: 1450RO3101A Datasheet

Current PartRFQ

B39431R0820H210

Qualcomm (RF front-end (RFFE) filters)In Stock: 86619B39431R0820H210 Datasheet

MFR RecommendedRFQ

B39431R0880H210

Qualcomm (RF front-end (RFFE) filters)In Stock: 2793B39431R0880H210 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the RO3101A is based on strict alignment of the following critical parameters:

• Center Frequency: 433.92 MHz (exact match required)
• Package Type: 4-SMD, No Lead (mechanical and electrical interface compatibility)
• Physical Dimensions: 5.00mm L × 4.60mm W (PCB footprint compatibility)
• Mounting Type: Surface Mount (assembly process compatibility)
• Operating Temperature Range: -40°C to 85°C (thermal envelope compatibility)
• RoHS Compliance: ROHS3 Compliant (regulatory requirement)
• Moisture Sensitivity Level: MSL 1 (handling and storage compatibility)

The substitute parts identified are Qualcomm B39431 series SAW filters, which maintain identical center frequency, package configuration, physical footprint, and compliance certifications. Both substitute parts are classified as active products with current manufacturing status and inventory availability.

Parameter Comparison

Engineering Selection Recommendations

Both B39431R0820H210 and B39431R0880H210 are suitable substitutes for the obsolete RO3101A based on the following criteria:

Mechanical Compatibility: Both substitute parts maintain identical footprint dimensions (5.00mm × 4.60mm) and 4-SMD, No Lead package configuration, ensuring direct PCB layout compatibility without redesign.

Electrical Compatibility: Center frequency of 433.92 MHz is identical across all three parts, maintaining RF circuit performance in the ISM band application.

Regulatory Compliance: All parts meet ROHS3 compliance and MSL 1 moisture sensitivity requirements, satisfying environmental and handling standards.

Product Availability: The substitute parts are classified as active products with current manufacturing status. B39431R0820H210 is available in Tape & Reel packaging with 86,538 units in stock. B39431R0880H210 is available in Cut Tape & Digi-Reel packaging with 2,704 units in stock.

Height Consideration: Substitute parts have a maximum height of 1.45mm compared to the RO3101A height of 1.60mm, providing additional clearance margin in space-constrained applications.

Frequently Asked Questions (FAQ)

Q: Can B39431R0820H210 and B39431R0880H210 be used interchangeably with RO3101A?

A: Both parts meet the critical substitution parameters: identical 433.92 MHz center frequency, matching 4-SMD No Lead package, identical 5.00mm × 4.60mm footprint, and equivalent compliance certifications. The primary difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel), which affects procurement and assembly processes but not electrical or mechanical compatibility.

Q: What is the difference between B39431R0820H210 and B39431R0880H210?

A: Both parts are functionally equivalent SAW filters with identical electrical specifications and physical dimensions. The designation difference reflects packaging configuration: B39431R0820H210 is supplied in Tape & Reel format, while B39431R0880H210 is supplied in Cut Tape & Digi-Reel format. Selection depends on assembly line requirements and minimum order quantities.

Q: Are there any height clearance issues when substituting with the Qualcomm parts?

A: No. The substitute parts have a maximum height of 1.45mm, which is 0.15mm lower than the RO3101A at 1.60mm. This provides additional clearance in PCB layouts and does not create any compatibility issues.

Q: Do the substitute parts maintain the same frequency stability and tolerance specifications?

A: The frequency stability (±0.032ppm) and tolerance (±75kHz) specifications are not provided in the substitute part datasheets. Verification of these parameters with Qualcomm technical documentation is necessary if these specifications are critical to system performance.

Q: What are the inventory considerations for these substitute parts?

A: B39431R0820H210 has significantly higher inventory availability (86,538 units) compared to B39431R0880H210 (2,704 units). For high-volume production requirements, B39431R0820H210 offers better supply chain continuity.